Well, I suppose if you use a square pan and cut them into 9 pieces equally they's be 37 calories.more
cup nonfat Vanilla Greek yogurt
cup skim milk
cup Cocoa powder
cup Old fashioned rolled oats (like Quaker)
teaspoon baking powder
Preheat the oven to 400°F. Grease a square baking dish (I used 8"x8"). Combine all ingredients into a food processor or a blender, and blend until smooth (about 1 minute). Pour into the prepared dish and bake for about 15 minutes. Allow to cool completely before cutting into 9 large squares.